A Few Clouds with Isolated Virga Near 20,000 Feet

Round-bottom clouds

Spotted these unusual clouds while running in Upper Las Virgenes Canyon Open Space Preserve today. Better known as Ahmanson Ranch, the open space area is on the western margin of the San Fernando Valley, northwest of Los Angeles.

The clouds were strikingly similar to clouds I’d photographed last January following the development and dissipation of a band of mid-level mammatus clouds over the San Fernando Valley. As before, the clouds were round-bottomed and were ragged with virga.

Upper air charts and model analyses indicated the clouds were at an altitude of about 20K-25K, and were associated with a very small scale upper level disturbance.

Here’s a wider view of the clouds.

Related post: Mammatus Clouds Over the San Fernando Valley, More posts…

Boney Mountain Views

This morning did the Boney Mountain north side loop with Tom and Elisa, who were visiting from Idaho.

Thanks to a moderate offshore flow, visibility from the high point at the top of the ridge (2900’+) was spectacular.

Anacapa and Santa Cruz Island loomed nearby, their eastern shores only 25 to 30 miles away. To the left of Exchange Peak and about 50 miles distant, the low silhouette of Catalina seemed to hover above the shimmering ocean. A little more to the east and about 40 miles away, Palos Verdes Peninsula jutted from behind Sandstone Peak and into the Pacific.

To the north and northeast Hines Peak (27 miles) and Cobblestone Mountain (33 miles) were prominent. A little further to the east and across I-5 Liebre Mountain and Burnt Peak (44 miles) could be seen.

Many of the peaks of the San Gabriel Mountains were easily seen, including Mt. Baldy about 75 miles to the east.

The distance winner was Mt. San Jacinto, a hard to see smudge in the haze on the eastern horizon, about 130 miles away.

Whiskey Flat Trail Burger Run 2011

Kern River near the finish of the 2011 Burger Run

The Burger Run is one of those runs that is much more difficult than its 14.5 miles and 2000′ of elevation gain would suggest. For one thing the Whiskey Flat Trail ain’t no namby-pamby city trail. It’s a rustic single track trail in the Southern Sierra that runs along the Kern River from the outskirts of Kernville up to Johnny McNally’s Fairview Lodge and Restaurant — and burger stand.



The trail is single track all of the way, with so many ups and downs you’ll think you’re riding a Magic Mountain roller coaster. It seems around every corner there is another creek or a ravine. The running is varied and technical, ranging from sweet pine-needle-lined stretches of trail to gnarly, V-rutted, overgrown, rocky, sandy, steep sections that test your trail running skill.

For a time it looked like a big low moving down the coast might cause some weather problems, but overnight rain turned to partly cloudy skies race day morning, with near perfect weather for the runners and walkers.

Many thanks to race director Mike Lane, all the volunteers, McNally’s, Indian Wells Brewing Company, and all of the friendly hikers and runners. Proceeds from the race benefit Run 4 A Way, a local non-profit group dedicated to enhancing the fitness and well being of the local youth. Results and finish line photos are posted on Run 4 A Way’s Facebook page.

Here’s an interactive Cesium browser View of the Burger Run course and an elevation profile generated in SportTracks. Following are a few additional photos. Click for a larger image:





Aid Station #1




Sock’em Dog Rapid




Steep Climb




Runner, River & Road




Kern Peaks




Ten Miles In